Advanced deinterlacer for high-definition and standard-definition video

a deinterlacer and high-definition technology, applied in the direction of picture reproducers using projection devices, signal generators with optical-mechanical scanning, television systems, etc., can solve the problems of blurred text, unusable video artifacts, and more visible artifacts

Active Publication Date: 2008-05-08
SYNAPTICS INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Video-mode deinterlacing often results in undesirable artifacts in the video.
However, displaying video on televisions that are 42 inches or larger in size and capable of displaying resolutions of 1920 by 1080 pixels can cause these artifacts to be more visible.
This use of deinterlacing may cause the text to appear blurred, or feathered, and may introduce artifacts such as line flicker and Moire.
This deficiency may cause portions of video to be deinterlaced using suboptimal techniques.

Method used

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  • Advanced deinterlacer for high-definition and standard-definition video
  • Advanced deinterlacer for high-definition and standard-definition video
  • Advanced deinterlacer for high-definition and standard-definition video

Examples

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Embodiment Construction

[0037]FIG. 1A shows an illustrative top-level diagram of deinterlacer circuitry 100A in accordance with one embodiment of the invention. Deinterlacer circuitry 100A can receive temporal and spatial motion data 110 as input. Temporal and spatial motion data 110 may include interlaced frames of video from standard definition television signals, high-definition television signals, or a combination of both. The interlaced frames of video may include several fields. For example, a single frame of video may include two fields—one field consisting of all of the even horizontal lines of video in the frame, and a second field consisting of all of the odd horizontal lines of video in the frame. These two fields may be referred to as having opposite polarity. Temporal and spatial motion data 110 may be passed to motion handling circuitry 120 for further processing.

[0038]Motion handling circuitry 120 may process all deinterlacing tasks associated with spatial motion and temporal motion. Spatial...

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Abstract

A motion adaptive video deinterlacer may process fields of video derived from frames of video. The deinterlacer may use multiple pixel motion engines to provide motion information about the pixels within each field. The output of the motion engines may be used to deinterlace the fields of video based on the detail within a field of video. The deinterlacer may use motion recursion and motion recirculation to provide temporal motion expansion for the pixels within each field. In addition, the deinterlacer may detect various cadences for various regions within the frames of video. The cadences may be detected using a calculated threshold, or without using a calculated threshold.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001]This claims the benefit of copending, commonly-assigned U.S. Provisional Patent Application No. 60 / 864,881 filed Nov. 8, 2006, which is hereby incorporated by reference herein in its entirety.BACKGROUND OF THE INVENTION [0002]This invention generally relates to systems and methods for deinterlacing high-definition and standard definition video using adaptive techniques for spatial and temporal motion.[0003]Video is often interlaced in order to improve picture quality and decrease the bandwidth required for transmission. Interlaced video formats provide one half of the lines in an image for any given frame—the odd-numbered horizontal lines of the frame may be displayed at one instant, while the even-numbered lines of the frame may be displayed the next. Each set of lines can be referred to as a field. In order to display the video in progressive, or noninterlaced, format, interlaced video must be deinterlaced. Deinterlacing requires the d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/01H04N5/44
CPCH04N7/012H04N5/144
Inventor SRINIVASAN, SUJITHGARG, SANJAYBALRAM, NIKHILMAINAK, BISWAS
Owner SYNAPTICS INC
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